Rails - Jun 2007 - Simplest way to encrypt / decrypt a string?

I have done multiple google searches and searched the mailing list. All
of the solutions I found seemed kind of heavy / complicated. I just want
a very simple way to encrypt and decrypt a string. Something like:

encrypt("fdsfdsfdsf", "some key");
decrypt("fdsfdsfsdf", "some key");

Is this possible?

Thanks for your help.

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Ben Johnson wrote:
> I have done multiple google searches and searched the mailing list. All
> of the solutions I found seemed kind of heavy / complicated. I just want
> a very simple way to encrypt and decrypt a string. Something like:
> 
> encrypt("fdsfdsfdsf", "some key");
> decrypt("fdsfdsfsdf", "some key");
> 
> Is this possible?
> 
> Thanks for your help.
# There''s a simple solution if all you want to do is store passwords or
something like that. The thing with this is that you can''t decrypt the 
string, because the result is a hash of what you want to encode.... But, 
as it always generates the same hash for the same string, you can 
re-encode the string and check if they are the same.
require ''digest/sha1''

class Encode
  def initialize(key)
    @salt= key
  end

  def encrypt(text)
     Digest::SHA1.hexdigest("--#{@salt}--#{text}--")
  end
end

e= Encode.new("This is a very hard key.")

pas1= e.encrypt("This is my secret password")
pas2= e.encrypt("This is my secret password")
pas3= e.encrypt("This is NOT my secret password")

puts(pas1 == pas2)
puts(pas2 == pas3)


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Ben Johnson wrote:
> I have done multiple google searches and searched the mailing list. All
> of the solutions I found seemed kind of heavy / complicated. I just want
> a very simple way to encrypt and decrypt a string. Something like:
> 
> encrypt("fdsfdsfdsf", "some key");
> decrypt("fdsfdsfsdf", "some key");
> 
> Is this possible?
> 
> Thanks for your help.
If you really need to decode your strings, check:

http://crypt.rubyforge.org/installation.html


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Ben Johnson wrote:
> I have done multiple google searches and searched the mailing list. All
> of the solutions I found seemed kind of heavy / complicated. I just want
> a very simple way to encrypt and decrypt a string. Something like:
> 
> encrypt("fdsfdsfdsf", "some key");
> decrypt("fdsfdsfsdf", "some key");
A quick Google for "Ruby AES encrypt" reveled several examples.

This one looks fine to me. (completely untested):
http://brentrubyrails.blogspot.com/2007/12/aes-encryption-and-decryption-in-ruby.html
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